Lump with hole and something moving in it.

Dr. Marie replied:

Though I can't say for sure, I am wondering if your kitten has a cuterebra. This is a parasite that goes through its life cycle inside of an animal. Near the end of its life cycle it becomes a little grub like animal and makes a small hole to "breathe" out of. Eventually, it pops out of the hole and turns into a fly.

Usually if I see a cuterebra, I try to get it out right away as it can cause problems and I'm sure it is not comfortable to have something moving under your skin. Usually we can remove them by making a small cut in the skin and slowly extracting it. It is definitely something you would want to have your vet do because if you end up rupturing the bug it can release toxins.

Do you know if your kitten has been near rabbit hutches at all? This is where they usually pick up these creatures, but I have seen indoor animals like hamsters pick them up too.

It is also possible that this is a ruptured abscess. However, I wouldn't expect to see something moving in it.

The best thing you can do is have your vet take a look!

I hope everything is ok!

Dr. Marie.

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